@Catija feel free to share what you know, I honestly didn't see any actual feature change that isn't listed. I don't consider color changes as feature changes. :/
@SPArcheon ohh. Well some do get such thing, personally I didn't, but my brother did. These days he's married to the girl he met in 8th grade, they became a couple two years later.
No worry my sister's story balance the happiness scales, and I'm just neutral. :D
Well I change a lot, name as well, but will always be Shadow.
@Elements how often you change avatar or display name, if at all?
Actually the name changes started only while in Stack Exchange, before that I was over a decade in other place (ASP forum, pretty big) and never changed name. Though I did change avatars there often, including dynamic avatar while it was possible. :P
Each reload, avatar would be different, the site allowed to set a free text URL as the avatar so I made a small service that took random image on each request. Don't remember the source though, maybe just pool of images I saved. :P
@ShadowWizardLoveZelda Once or twice in eleven years or so. I changed of display pic about 5 years ago. And I've had this display name for about 10 years I think (unless you count the minor change I made to it last month).